Retrieved November 19, 2006 ^ US EPA, "Forestry Facts and Figures". ^ Pimm, Stuart (2002). “The Dodo became extinct (and other ecological myths)”. Annals
Damsté 2012 William Laurance 2010 David Tilman 2008 Bert Brunekreef 2006 Stuart L. Pimm 2004 サイモン・アッシャー・レヴィン 2002 Lonnie G. Thompson 2000 Poul Harremoës 1998
ISBN 978-84-87334-25-2 Ehrlich, Paul R.; Dobkin, David S.; Wheye, Darryl; Pimm, Stuart L. (1994). The Birdwatcher's Handbook: A Guide to the Natural History
ISBN 978-0-589-50260-7 ^ a b Ehrlich, Paul; Dobkin, David; Wheye, Darryl; Pimm, Stuart (1994). The Birdwatcher's Handbook. Oxford University Press. p. 434.